@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap");

:root {
  --color-primary: #64748b;
  --color-cta: #f97316;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-surface-soft: rgba(255, 255, 255, 0.72);
  --color-text: #334155;
  --color-text-strong: #0f172a;
  --color-muted: #56657a;
  --color-success: #065f46;
  --color-error: #991b1b;
  --border-subtle: rgba(100, 116, 139, 0.18);
  --border-strong: rgba(100, 116, 139, 0.3);
  --border-heavy: rgba(51, 65, 85, 0.16);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 36px rgba(15, 23, 42, 0.1);
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --ui-font: "Inter", "SF Pro Text", "SF Pro Display", "Segoe UI", sans-serif;
  --transition-fast: 180ms ease;
  --app-max-width: 1400px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--ui-font);
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(148, 163, 184, 0.14), transparent 28%),
    linear-gradient(180deg, #fbfdff 0%, #f2f6fb 100%);
}

a {
  color: inherit;
}

code {
  font-family: "SFMono-Regular", "SF Mono", "Consolas", monospace;
  font-size: 0.94em;
}

.site-shell {
  width: min(calc(100% - 32px), var(--app-max-width));
  margin: 0 auto;
  padding: 18px 0 28px;
}

.site-header,
.site-footer,
.site-main {
  width: 100%;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 26px;
}

.site-brand {
  color: var(--color-text-strong);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.site-nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-nav a,
.footer-links a {
  color: var(--color-muted);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible,
.footer-copy a:hover,
.footer-copy a:focus-visible {
  color: var(--color-text-strong);
}

.site-nav a:focus-visible,
.footer-links a:focus-visible,
.footer-copy a:focus-visible,
.site-brand:focus-visible {
  outline: none;
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.site-main {
  display: grid;
  gap: 22px;
}

.hero,
.content-card,
.page-hero,
.page-section {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.66));
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero::before,
.content-card::before,
.page-hero::before,
.page-section::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.34);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1,
.title-block h1 {
  margin: 0;
  color: var(--color-text-strong);
  font-size: clamp(2.25rem, 4vw, 4.1rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
  max-width: 14ch;
}

.hero-copy,
.page-hero p,
.content-card p,
.page-section p,
.page-section li,
.footer-copy {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.97rem;
  line-height: 1.68;
}

.hero-copy,
.page-hero p {
  max-width: 54rem;
  margin-top: 14px;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.content-card {
  display: grid;
  gap: 14px;
}

.content-card h2,
.page-section h2 {
  margin: 0;
  color: var(--color-text-strong);
  font-size: 1.1rem;
  letter-spacing: -0.03em;
}

.feature-list,
.section-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-strong);
}

.feature-list li::marker,
.section-list li::marker {
  color: var(--color-cta);
}

.page-main {
  display: grid;
  gap: 22px;
}

.page-section {
  display: grid;
  gap: 16px;
}

.section-stack {
  display: grid;
  gap: 12px;
}

.notice-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: rgba(248, 250, 252, 0.78);
  box-shadow: var(--shadow-sm);
}

.legal-label {
  margin: 0;
  color: var(--color-text-strong);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.license-text {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-text-strong);
  font-family: inherit;
  font-size: 0.96rem;
  line-height: 1.7;
  max-width: 72ch;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.license-file-list {
  gap: 8px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
  padding: 0 8px;
}

.footer-copy a {
  color: var(--color-text-strong);
  font-weight: 600;
  text-decoration: none;
}

[hidden] {
  display: none !important;
}

.app-shell {
  position: relative;
  width: 100%;
  margin: 0;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.66));
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.app-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.34);
  pointer-events: none;
}

[data-page="home"] .app-shell {
  padding: 24px;
}

.layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

[data-page="home"] .layout {
  gap: 24px;
}

.preview-panel {
  grid-column: span 8;
  display: grid;
  gap: 18px;
  min-width: 0;
}

[data-page="home"] .preview-panel {
  gap: 20px;
}

.control-panel {
  grid-column: span 4;
  min-width: 0;
}

[data-page="home"] .control-panel {
  padding-top: 6px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  flex-wrap: wrap;
}

[data-page="home"] .preview-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px 22px;
}

.title-block {
  flex: 1 1 36rem;
  min-width: 0;
  max-width: 44rem;
}

[data-page="home"] .title-block {
  display: grid;
  gap: 0;
  max-width: 39rem;
}

[data-page="home"] .title-block .eyebrow {
  margin-bottom: 8px;
}

[data-page="home"] #site-title {
  font-size: clamp(2rem, 1.2rem + 1.8vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
  max-width: 13ch;
}

[data-page="home"] .hero-copy {
  max-width: 36rem;
  margin-top: 12px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 9px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-sm);
  color: var(--color-text-strong);
  font-size: 0.84rem;
  font-weight: 600;
  white-space: nowrap;
}

[data-page="home"] .status-chip {
  justify-self: end;
  align-self: start;
  margin-top: 4px;
}

.status-chip[data-tone="ready"] {
  border-color: rgba(16, 185, 129, 0.2);
  background: rgba(236, 253, 245, 0.92);
  color: var(--color-success);
}

.status-chip[data-tone="blocked"] {
  border-color: rgba(239, 68, 68, 0.2);
  background: rgba(254, 242, 242, 0.94);
  color: var(--color-error);
}

.preview-frame {
  position: relative;
  min-height: 700px;
  padding: 22px;
  border: 1px solid var(--border-heavy);
  border-radius: 20px;
  background: linear-gradient(180deg, #f4f7fb 0%, #edf2f7 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.78),
    var(--shadow-md);
}

.preview-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 14px;
  pointer-events: none;
}

.preview-svg-wrap {
  position: relative;
  z-index: 1;
  min-height: 658px;
  display: grid;
  place-items: center;
  padding: 20px 16px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0.24));
}

.preview-svg-wrap svg {
  width: min(100%, 620px);
  height: auto;
  filter: drop-shadow(0 14px 22px rgba(15, 23, 42, 0.1));
}

.control-form {
  display: grid;
  gap: 14px;
}

.panel-card {
  padding: 20px;
  border: 1px solid rgba(203, 213, 225, 0.9);
  border-radius: 14px;
  background: var(--color-surface);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.86),
    var(--shadow-sm);
}

.panel-card h2 {
  margin: 0;
  color: var(--color-text-strong);
  font-size: 1.02rem;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.control-card {
  display: grid;
  gap: 0;
}

.panel-section {
  display: grid;
  gap: 16px;
}

.panel-section-bordered {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px 12px;
}

.field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.field-half {
  grid-column: span 6;
}

.field-third {
  grid-column: span 4;
}

.field-full {
  grid-column: 1 / -1;
}

.field-label {
  color: var(--color-text-strong);
  font-size: 0.88rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.field[data-invalid="true"] .field-label {
  color: var(--color-error);
}

input[type="text"],
select,
input[type="file"] {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid #ccd5e1;
  border-radius: var(--radius-sm);
  background: #fbfcfe;
  color: var(--color-text-strong);
  font: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.92);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast);
}

input[type="text"]::placeholder {
  color: #7b8797;
}

select,
input[type="file"],
input[type="file"]::file-selector-button {
  cursor: pointer;
}

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-primary) 50%),
    linear-gradient(135deg, var(--color-primary) 50%, transparent 50%);
  background-repeat: no-repeat;
  background-position:
    calc(100% - 17px) calc(50% - 3px),
    calc(100% - 11px) calc(50% - 3px);
  background-size: 6px 6px;
  padding-right: 36px;
}

input[type="file"] {
  padding: 8px 11px;
  color: var(--color-muted);
}

input[type="file"]::file-selector-button {
  margin-right: 10px;
  padding: 8px 11px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #f4f7fb;
  color: var(--color-text-strong);
  font: inherit;
  font-weight: 600;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast);
}

input[type="text"]:hover,
select:hover,
input[type="file"]:hover,
input[type="file"]::file-selector-button:hover {
  border-color: #aeb8c6;
}

input[type="text"]:focus,
select:focus,
input[type="file"]:focus {
  outline: none;
  border-color: #475569;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.16);
}

.field[data-invalid="true"] input[type="text"],
.field[data-invalid="true"] select,
.field[data-invalid="true"] input[type="file"] {
  border-color: rgba(153, 27, 27, 0.34);
  background: rgba(254, 242, 242, 0.78);
}

.field[data-invalid="true"] input[type="text"]:focus,
.field[data-invalid="true"] select:focus,
.field[data-invalid="true"] input[type="file"]:focus {
  border-color: rgba(153, 27, 27, 0.5);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.field-message {
  min-height: 1.15em;
  margin: 0;
  color: #6b7788;
  font-size: 0.82rem;
  line-height: 1.35;
}

.field-message[data-tone="error"] {
  color: var(--color-error);
}

.field-message[data-tone="info"] {
  color: var(--color-primary);
}

.radio-group {
  gap: 12px;
}

.radio-stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.tag-range-stack {
  align-items: stretch;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid #ccd5e1;
  border-radius: var(--radius-sm);
  background: #fbfcfe;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.radio-option:hover {
  border-color: #aeb8c6;
}

.radio-option:has(input:checked) {
  border-color: rgba(71, 85, 105, 0.42);
  background: #ffffff;
  box-shadow:
    inset 0 0 0 1px rgba(100, 116, 139, 0.16),
    0 1px 2px rgba(15, 23, 42, 0.04);
}

.field[data-invalid="true"] .radio-option {
  border-color: rgba(153, 27, 27, 0.24);
  background: rgba(254, 242, 242, 0.58);
}

.radio-option input {
  margin: 0;
  accent-color: var(--color-primary);
}

.radio-text {
  color: var(--color-text-strong);
  font-size: 0.9rem;
  font-weight: 500;
}

.tag-range-option {
  align-items: flex-start;
  padding-block: 11px;
}

.tag-range-copy {
  display: grid;
}

.tag-range-title {
  color: var(--color-text-strong);
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.range-guide-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-strong);
}

.range-guide-list li::marker {
  color: var(--color-cta);
}

.range-guide-copy {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.ghost-button,
.primary-button {
  appearance: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast),
    opacity var(--transition-fast);
}

.ghost-button {
  justify-self: start;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: rgba(248, 250, 252, 0.9);
  color: var(--color-primary);
}

.primary-button {
  width: 100%;
  min-height: 50px;
  padding: 13px 16px;
  border: 1px solid rgba(249, 115, 22, 0.72);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, #fb923c 0%, var(--color-cta) 100%);
  box-shadow: 0 14px 24px rgba(249, 115, 22, 0.2);
  color: #ffffff;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}

.ghost-button:hover,
.primary-button:hover {
  transform: translateY(-1px);
}

.ghost-button:focus,
.primary-button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.14);
}

.primary-button:focus {
  box-shadow:
    0 0 0 3px rgba(249, 115, 22, 0.18),
    0 14px 24px rgba(249, 115, 22, 0.2);
}

.ghost-button:disabled,
.primary-button:disabled {
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.ghost-button:disabled {
  opacity: 0.6;
}

.primary-button:disabled {
  opacity: 1;
  border-color: rgba(203, 213, 225, 0.96);
  background: linear-gradient(180deg, #e9edf2 0%, #dfe5ec 100%);
  color: #8a97a8;
}

.export-card {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 14px;
  border-color: rgba(249, 115, 22, 0.18);
  background: linear-gradient(180deg, #ffffff 0%, #fffaf6 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 12px 28px rgba(15, 23, 42, 0.08);
}

.export-card h2 {
  font-size: 1.06rem;
}

.export-copy {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.export-actions {
  display: grid;
  gap: 10px;
}

.export-actions .ghost-button,
.export-actions .primary-button {
  width: 100%;
  justify-self: stretch;
  text-align: center;
}

.export-actions .ghost-button {
  min-height: 46px;
}

.banner {
  min-height: 58px;
  padding: 15px 16px;
  border: 1px solid #d6dee8;
  border-radius: var(--radius-md);
  background: rgba(248, 250, 252, 0.92);
  color: var(--color-text-strong);
  font-size: 0.91rem;
  font-weight: 500;
  line-height: 1.5;
}

.banner[data-tone="ready"] {
  border-color: rgba(16, 185, 129, 0.2);
  background: rgba(236, 253, 245, 0.92);
  color: var(--color-success);
}

.banner[data-tone="error"] {
  border-color: rgba(239, 68, 68, 0.2);
  background: rgba(254, 242, 242, 0.94);
  color: var(--color-error);
}

@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  [data-page="home"] .app-shell {
    padding: 20px;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  [data-page="home"] .layout {
    gap: 20px;
  }

  .preview-panel,
  .control-panel {
    grid-column: 1 / -1;
  }

  [data-page="home"] .preview-header {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  [data-page="home"] .status-chip {
    justify-self: start;
    margin-top: 0;
  }

  [data-page="home"] .control-panel {
    padding-top: 0;
  }

  .export-card {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(calc(100% - 16px), var(--app-max-width));
    padding-top: 10px;
  }

  .site-header,
  .site-footer {
    display: grid;
  }

  .site-nav,
  .footer-links {
    gap: 12px;
  }

  .hero,
  .content-card,
  .page-hero,
  .page-section {
    padding: 18px;
    border-radius: 18px;
  }

  .notice-card {
    padding: 14px;
  }

  .license-text {
    font-size: 0.9rem;
  }

  .hero h1,
  .page-hero h1,
  .title-block h1 {
    font-size: clamp(2rem, 10vw, 2.85rem);
    max-width: none;
  }

  .app-shell {
    padding: 14px;
    border-radius: 18px;
  }

  [data-page="home"] .app-shell {
    padding: 16px;
  }

  .preview-header {
    display: grid;
  }

  [data-page="home"] #site-title {
    font-size: clamp(1.85rem, 8vw, 2.45rem);
    line-height: 1.06;
    max-width: 12ch;
  }

  [data-page="home"] .hero-copy {
    max-width: 100%;
  }

  .preview-frame {
    min-height: 0;
    padding: 12px;
  }

  .preview-svg-wrap {
    min-height: 320px;
    padding: 10px 8px;
  }

  .preview-svg-wrap svg {
    width: min(100%, 330px);
  }

  .field-grid {
    grid-template-columns: 1fr;
  }

  .field-half,
  .field-third,
  .field-full {
    grid-column: auto;
  }

  .radio-stack {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}